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专用微处理器的处理能力、速度和成本等性能互相重叠,已使人们在选择数据处理用的器件时不再能从可用的产品中作出明确的选择.通用微处理器(MPU),如DigitalEquipment公司的300MHz Alpha AXP21164和IBM/Motorola的100MHzPowerPC 604,现在都凭借其速度性能与很多数字信号处理器(DSP)在数据简化应用方面展开竞争.相反,当今的DSP包含有一度只能在通用MPU中才能找到的特性.TexasInstruments公司的C40 DSP包括一种包含有非DSP RISC(精简指令集计算)指令的扩展指令集.很多DSP还可完成浮点运算,而这一性能一度曾是通用MPU的独占领域.
Special microprocessors, such as processing power, speed and cost, overlap each other and have made it no longer possible to make a clear choice of available products when selecting data processing devices such as Digital Microprocessors (MPUs) such as DigitalEquipment The company’s 300MHz Alpha AXP21164 and IBM / Motorola’s 100MHz PowerPC 604 are now competing with many digital signal processors (DSPs) for data-reduction applications due to their speed performance, whereas today’s DSPs include devices that once were only available in the Universal MPU Can be found.TexasInstruments’ C40 DSP includes an extended instruction set that includes non-DSP RISC (Reduced Instruction Set Computing) instructions.Many DSPs also perform floating-point operations that were once exclusively monolithic for general purpose MPUs field.